Nowadays, in social cities, surveillance cameras are basically installed in every corner. We will see various surveillance cameras in many residential buildings, office buildings, shopping malls, hotels and other places to prevent the occurrence of illegal activities.
With the steady development of economy and technology, people’s awareness of security monitoring is constantly increasing, and security monitoring is required in any place. However, the complexity of urban development makes the monitoring system of traditional access methods unable to fully meet the requirements, and PON is adopted. The monitoring system for network access has gradually become popular.
As an important access device in the PON system, the choice of ONU is crucial, so which ONU is better and how to choose?
ONU is a user-end device for PON applications and a high-bandwidth and cost-effective terminal device necessary for the transition from the “copper cable era” to the “optical fiber era”. It plays a decisive role in network construction.
ONU is an optical network unit, which uses a unit fiber to connect to the central office OLT to provide services such as data, voice, and video. It is responsible for receiving the data sent by the OLT, responding to the commands sent by the OLT, buffering the data and sending it to the OLT. It requires relatively high sensitivity and is simple to use.
ONUs are divided into ordinary ONUs and ONUs with PoE. The former is the most common ONU device and the most commonly used ONU. The latter has PoE function, that is, it has several PoE interfaces. You can connect surveillance cameras through these interfaces. They work normally and get rid of complicated power supply wiring.
In addition to PoE ports, ONUs with PoE must have a PON. Through this PON, they can be connected to the OLT to form a PON network as a whole.
Post time: Nov-19-2021